Shorted charger

[zirawyz]

Hi every body in the forum. I did shorted my "54.6"vdc charger "." It still working but passes its rating voltage now, it become higher of about "68vdc."
I dont know how to reduce it. Any help gays? I will appreciate it.

 

[retiredNH]

Buy a new charger. You risk destroying your battery with this thing. Unless you have a deep knowledge of electronic troubleshooting, there's no chance of fixing the thing. Even if you did, the failed part may not be available to you. It might even be custom. And, without a proper schematic, which is no doubt unavailable, you wouldn't even know the value of the failed part.

 

[PedalUma]

@retiredNH is correct. There is also corrosion for example at C12. Do not mess with it. If you were a Navy electronics expert trapped in a submarine and repairing it were the only way the sub could surface, that would be different! In the charging process. 1) Turn off the battery. 2) Plug the new charger into the battery. 3) The final step is to plug the charger into the wall. This final step puts any spark at the wall as alternating current, away from your battery.

 

[harryS]

In seven years of ebiking, I think I have seen four chargers quit/fail, Buy a new one,

 

[RunForTheHills]

A professional electronics technician could likely identify the failed component(s) and repair it. You could take it to an electronics repair shop and pay them $30-$50 to repair it or you could just spend $20-$30 to replace it.

 

[tomjasz]

I buy backups to my Satiator from littokala ( sp?) on Aliexpress. $10, same that many sell for $20-$30.

 

[zirawyz]

Buy a new charger. You risk destroying your battery with this thing. Unless you have a deep knowledge of electronic troubleshooting, there's no chance of fixing the thing. Even if you did, the failed part may not be available to you. It might even be custom. And, without a proper schematic, which is no doubt unavailable, you wouldn't even know the value of the failed part.

Agree with yah.
I think, also rising questions to an expert for the purpose to learn and understand something from those failed circuits...

 

[PedalUma]

With another look at the OP photo it is coincidental that it died 5-years to the day from the date printed on the board 09/27/2016. Again, I see the corrosion at C12. Was it in a damp tropical beach bag?

 

[harryS]

Last thing I want to learn at this point in lfe is how to design or debug a switching supply. They got guys in CHina who copy the established designs all the time. Then they remove components til it stop working and freeze the design,

LOL. I stole that line. I believe it came from Muntz TV 60 years ago, first televison to break the $99 price barrier.

.

 

[zirawyz]

With another look at the OP photo it is coincidental that it died 5-years to the day from the date printed on the board 09/27/2016. Again, I see the corrosion a

 

[zirawyz]

I m curious n like to learn from failure.

@retiredNH is correct. There is also corrosion for example at C12. Do not mess with it. If you were a Navy electronics expert trapped in a submarine and repairing it were the only way the sub could surface, that would be different! In the charging process. 1) Turn off the battery. 2) Plug the new charger into the battery. 3) The final step is to plug the charger into the wall. This final step puts any spark at the wall as alternating current, away from your battery.

I m curious and like to learn from failures.
Tough the corrosion you mentioned in c12, this charger is still energized; just it is jumping to higher voltage output 68v instead of its rated voltage of 54.6 vdc. It's like a resistance failure here.
The physical damage is imminent is in the area of R5.

 

[Gionnirocket]

With another look at the OP photo it is coincidental that it died 5-years to the day from the date printed on the board 09/27/2016. Again, I see the corrosion at C12. Was it in a damp tropical beach bag?

C12 is often used as the self destruct capacitor set to discharge the day after the warranty ends

 

[retiredNH]

I m curious n like to learn from failure.

I m curious and like to learn from failures.
Tough the corrosion you mentioned in c12, this charger is still energized; just it is jumping to higher voltage output 68v instead of its rated voltage of 54.6 vdc. It's like a resistance failure here.
The physical damage is imminent is in the area of R5.

It probably isn't a resistor failure. These are switching supplies. Higher voltage could be due to any number of reasons. Without a schematic, it's shooting in the dark to guess what the problem is.

 

[tomjasz]

it's shooting in the dark

My solution has been to keep a couple of cheap chargers as backups. Sorry I'm repeating but but repairing a cheap charger just isn't cost effective.

 

[PedalUma]

I sold a charger to a guy Yesterday not following the 1,2,3 process above. Too lazy. Charging to 100%, leaving it plugged in for a week. $20. Then he did not follow the process again. Even though the simple process of plugging it into the wall as the last step with the battery off was fully explained in person. He went home and sparked the charge port on his battery. So, he came back, hat in hand, and I sold him a new charger and battery Today. I fully explained everything again. That got his attention. No, it is not worth failure analysis of burnt toast.

 

[PedalUma]

Hey, @Gionnirocket! Recumbents are a Huge Pain. It took a day to design, gather parts, fabricate and install this secure battery holder. No place to put it. There is a tapped screw from a frame cross brace that foundationally secures it. Off topic, but all about advanced problem solving. Display, programing, polish, linked chain and it is done.
I love the idea of the C12 planned destruction. For my wife it was when she hit menopause, menta-pause C12 destruction.

 

[CMac]

I have two fifty two volt batteries, two chargers and the charging ports are different on each . I made two adapters so I can charge either battery from either charger. I had one charger failure previously and don't want to wait a week for one to get here. I will look into the cheap backup charger. Keep them on the road.